异步加载图像的问题

发布于 2024-11-19 20:24:08 字数 940 浏览 0 评论 0原文

我有一个使用来自 Web aa 源的图像的应用程序。对于我的应用程序，我首先在单独的线程中下载图像，并且仅当图像存在于磁盘上时我才会显示在列表中。下载器是一个单独的线程，但我对线程的使用非常陌生，现在还有其他事情让我感到困惑。除非刷新视图（这是我的列表），否则我的图像不会显示。现在我需要显示我的图像，所以我在自定义视图中写了这个：

private  Runnable LoaderTask=new Runnable(){
    public void run() {
        if(cellIcon!=null){
            if(iconCache.get(cellIcon)!=null){              
                icon.setImageBitmap(iconCache.get(cellIcon)); 
                mHandler.postDelayed(this, 200);
            }
        }

    }

};
private class ImageThread extends Thread{

    @Override
    public void run() {
        //  mHandler.removeCallbacks(LoaderTask);
          mHandler.postDelayed(LoaderTask, 100);


    }

}

我像这样触发我的线程，

  ImageThread thread=new ImageThread();
    thread.start();

处理程序在类的开头实例化。但当我这样做时，除非我刷新我的观点，否则什么都不会发生。我在我的一个线程中尝试了 (Activity).runOnUIThread 我收到了 stackoverflow 错误。我该如何解决这个问题或者还有其他建议吗？你可以给我吗？谢谢

原文

I have an application that uses images from web a a source. for my application I'm first downloading images in seperate thread and only if image exists on disk I show on the list. Downloader is a seperate thread, but I'm very new using threads and now something else is confusing me. My images are not shown unless I refresh the view, that is my list. Now I needed to show my images so I wrote this in my custom view :

private  Runnable LoaderTask=new Runnable(){
    public void run() {
        if(cellIcon!=null){
            if(iconCache.get(cellIcon)!=null){              
                icon.setImageBitmap(iconCache.get(cellIcon)); 
                mHandler.postDelayed(this, 200);
            }
        }

    }

};
private class ImageThread extends Thread{

    @Override
    public void run() {
        //  mHandler.removeCallbacks(LoaderTask);
          mHandler.postDelayed(LoaderTask, 100);


    }

}

And I trigger my thread like this

  ImageThread thread=new ImageThread();
    thread.start();

the handler is instantiated in the beginning of the class. But when I do this n othing happen until I refresh my views. I tried (Activity).runOnUIThread inside one of my threads I got stackoverflow error. How do I solve that or are there any other advices.you can give me? Thanks

分享到QQ

分享到微博